Highchair



FIG. 1 is a front view of the highchair showing my new design;

FIG. 2 is a rear view of thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof; and,

FIG. 5 is a top view thereof. 

CLAIM I claim the ornamental design for a highchair, as shown and described. 